An expansion at a rock salt manufacturing facility in Utah added two 350 gallon tanks for two oils used in the process. One is a lightweight oil, the other a thick, viscous heavy F300 oil; both needed to be maintained at 170° F (77° C) via recirculating pumps. Both oils arrive at the plant via railcar at 400° F (204° C).- The liquid is piped through the facility via offload lines from the rail cars and are maintained between 400° F (204° C) and 300° F (149° C) via Chromalox heat trace cable to avoid the fluid setting up in the lines due to batch processing. The oil tanks are heated by circulation heaters at 2.5 wpsi. The system’s recirculation lines have electric heat trace, with each tank utilizing 500 feet (152.4 m) of recirculation piping.

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